Deliver tragic new charge in case? (4,9)

I believe the answer is:

live cartridge

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'charge in case?' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'deliver tragic new' is the wordplay.
'new' indicates anagramming the letters.
'deliver'+'tragic'='delivertragic'
'delivertragic' is an anagram of 'LIVE CARTRIDGE'.

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(Another definition for live cartridge that I've seen is " certainly not blank".)

I've seen this clue in The Telegraph.

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